> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/iii.-using-spring-boot/20.-developer-tools/20.2.-automatic-restart/20.2.6.-customizing-the-restart-classloader.md).

# 20.2.6. 自定义restart类加载器

正如之前[Restart vs Reload](https://docs.spring.io/spring-boot/docs/2.0.0.RELEASE/reference/htmlsingle/#using-spring-boot-restart-vs-reload)章节讨论的，重启功能是通过两个类加载器实现的。对于大部分应用来说是没问题的，但有时候它可能导致类加载问题。

默认情况，在IDE里打开的项目会通过'restart'类加载器加载，其他常规的`.jar`文件会使用'basic'类加载器加载。如果你工作在一个多模块的项目下，并且不是每个模块都导入IDE里，你可能需要自定义一些东西。你需要创建一个`META-INF/spring-devtools.properties`文件，`spring-devtools.properties`文件可以包含`restart.exclude.`，`restart.include.`前缀的属性。`include`元素定义了那些需要加载进'restart'类加载器中的实体，`exclude`元素定义了那些需要加载进'basic'类加载器中的实体，这些属性的值是一个将应用到classpath的正则表达式。例如：

```
restart.include.companycommonlibs=/mycorp-common-[\\w-]+\.jar
restart.include.projectcommon=/mycorp-myproj-[\\w-]+\.jar
```

**注** 所有属性的keys必须唯一，只要以`restart.include.`或`restart.exclude.`开头都会考虑进去。

**注** 所有来自classpath的`META-INF/spring-devtools.properties`都会被加载，你可以将文件打包进工程或工程使用的库里。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://jack80342.gitbook.io/spring-boot/iii.-using-spring-boot/20.-developer-tools/20.2.-automatic-restart/20.2.6.-customizing-the-restart-classloader.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.